Combustion-controlling device for furnaces or the like



D. F. WIORTON.l coMBusTxoN 'cONTRoLLING DEVICE FOR FuRNAcEs on.THE'L|KE.

APPLICATION FILED JUNEVZG, 19H3.

Patented' Jan. 3, 1922;

ETE@

DAVID FLOURNOY MORTON, OF BOSTON, MASSACHUSETTS.

GOMBUSTION-CONTROLLING DEVICE FOR FURNACES 0R THE LRE.

License.

Specification of Letters Patent.

Patented Jan; 3, i922.

Application filed .Tune 26, 1918. Serial No. 242,033.

To all 'LU/"tom t may @0f/warn.'

Be it known that I, DAVID F. MonroN, a citizen of the United States,residing at Boston, in the county of Suffolk, State of Mass., haveinvented certain new and useful Improvements in Combustion-ControllingDevices for Furnaces or the like, of which the following is adescription, reference being had to the accompanying drawing and to thefigures of reference marked thereon.

The invention relates to new and useful improvements in combustioncontrolling devices for furnaces, water heaters, stoves, ranges or thelike and more particularly to devices for controlling the How of the Huegases to the chimney and the flow of air to the point of combustion.

An object of the invent-ion is to provide a pipe section adapted forattachment to the smoke collar of al furnace, heater, stove, range orthe like7 which pipe section is provided with devices for controllingthe How of the Hue gases through the pipe section and devices foradmitting cold air through the pipe section to check the How of the Huegases and means for admitting hot air through the pipe section in such amanner that it may How in a direction opposed to the direction of How ofthe Hue gases and thus pass to the point of combustion.

A further object of the invention is to provide a pipe section of theabove character which is so constructed that it may be attached in avertical line of pipe leading to the chimney or in a horizontal line ofpipe leading to the chimney.

These and other objects will in part be obvious and will in part behereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of theinvention;

Figure 1 is a longitudinal sectional view through the pipe sectionshowing the device arranged for horizontal connection;

Fig. 2 is a top plan view of the same, and

Fig. 3 is a view from the chimney end of the device.

In carrying out the invention I provide a pipe section which is formedwith a jacket or casing spaced therefrom So as to provide an air chamberthrough which air may pass along the heated pipe section and thus becomeheated, said pipe section having intake ports for the heated air, whichare so disposed that the heated fresh air may seek or find the path ofleast resistance and pass in a direction opposed tothe direction oftravel of the hot Hue gases. The pipe section is preferably providedwith a hand damper which is so constructed as to perl mit a restrictedor limited circulation of air or gases in either direction, even thoughthe damper is fully closed. It is also provided with an automatic damperwhich serves to regulate the How of the Hue gases through the pipesection. It is further provided with an automatic cold air check so thatif the draft is :greatly increased by temporary disturbances of thedraft, said damper will prevent the fire from racing in the furnace.This pipe section containing all the parts above specified is soconstructed that it can be used as a straight run section of smoke pipeor elbow section of smoke pipe as the circumstances require.

Referring more in detail to the drawings, I have shown my improvementsas embodied in asingle enlarged section. of smoke pipe 1, which at itsends has laterally eX- tending portions 2 and 3, respectively and theseportions carry a casing or jacket indicated at 4. Between the casing oracket 4 and the main section y1 of the pipe, there is an annular chamber5.' The section 1 of the pipe at the end thereof nearest the furnace orstove, has an inwardly-v projecting Hange 6 which is formed with anopening adapted to receive a short section of smoke pipe 7 for makingconnection to the smoke collar of the furnace, heater or the like. Thisconnection is used when the main section 1 is used as a straight linesection of smoke pipe between the furnace and the chimney. In theV sidewall of the main pipe section 1, there is an opening about which a Hange8 extends. This opening is closed by a cover 9 when the pipe section 7is attached to the end of the main pipe section. When the main pipesection is arranged horizontally as in Fig. 1, the short section ofsmoke pipe 7 is inserted in the opening at the en d of the section asshown in the figure, and the cover 9 shown in Fig. 3 is inserted in theopening formed by the flange 8. On the other hand when the main pipesection 1 is used as an. elbow section and is arranged vertically, thenthe short sectlon of smoke pipe 7 is inserted in the open-V ingsurrounded by the Hange 8' and the cover 9 is inserted in the opening inthe Y' end of the pipe section'. At the/other end Yio sectional area ofthe smoke pipe sections 7V and 10'. As a result the velocity of the'iowof flue gasesV from the furnace or Ystove through the Vsection 7 intothe main section f 1 and then out through the section 10 is materiallyreduced through the section 1, owingV to this increased area.V In theVside wall of the section 1 is an opening 12which( is adapted to beclosed by an automatic check damper or drafty breaker 13.V This pointolf the centralV axis Vof the damper. The damper is counterbalanced by aweight 15. This weight 'is'positioned so that theV damper! will justclose when unhindered by the operating means therefor. ShouldV theoperation of a vacuumfcleaner discharging its sweeping into the chimneyorrghould the Y y outside windsblowing over the top of the draft breakerYis chimney, cause the draft to be materially increased, the draftYbreaker when properly balanced will open .and prevent the fire fromVracing in thefurnace.V This operation is due to there being unequalforces because of the unequalVV pressuresY on ,Y the unequal areas oneither side of the axis on which the pivoted. The damper y0r draftbreaker 13V V1s provided with an arm 16 to which is attached a chain 17which mayV be utilized for operatingthe coldair check or draft breakerby external means. Mounted inthe mainfsection 1 of the'pipe is a damper18 which is supported by a-'pivot shaft 19. Attached to this shaft is alever or arm 20 to which is connected a chain not shown wherebysaiddamper may be oper-` ated by external means. The damper 18 is connectedby a chain 22 with the draft breaker 13.!` This chainV is so Varrangedthat when the draft breaker opens automatically through an abnormalincrease in the draft,Y

the damper 18 will not be operated but when the damper 18 is turned tocheck the flow of the flue gases, the damper 13 willbeautematicallyopened to permit cold air to ypass directly to thechimney,thus checking the draft. l Y f 1 In the ypipe section 7 there isa handdamper 23 which is mounted on a shaft24 having a handle 25 Vfor turningthe same. This damper 23 is formed with cut away portions or scallops 26which are yso disposed Hinthe damper as to permit a limited Vorcre-Vstricted circulation of air and gases in either directionwhile thedamper isfully closed. The flange 3 of the pipe section 1 is OlmGdthroughports 30 into the Vmain chamber of the pipe sectionV 1.y VVTheair inthemean time VYhasb'een heatedto a high temperature as it haspassed along the hot metal plate forming the wall of the main section1.V In this mannery the yheat ofrrthese gases which would otherwise beWasted is utilized. Theheated Vair passing :into the chamber ofthe'mainsection 1 travels around back of the smoke pipe 7 (where there is nomotion to the flue Y gases) until it nds the yplace of leastresistdraftrbreaker is pivoted at 14, which is aV ance or opposition toits'. travel and here the air turns'and continuesits course into the Yfurnace vor stove. It is well understood that Y of combustion inthefurnace it comes in contact with still hotter gases and reaches thepoint of Vcombustion in a very heated condition where it enters intoand'supports the combustion. The flow of the air to the point ofcombustion is further aided by the aihnity of heated carbonmonoxid foroxygen.

- From the above it will be apparent that I Vhave provided a verycompact arrangement of dampers and air controlling devices.,y

which may bek readily and quickly applied to affurna'ce either as astraight line of pipe or asan elbow sectionand when installed the flowof the Vflue gases will Vbe automaticallyV controlled by the dampers andby .the automatic draft breaker; the flow of the .flueV gases may'alsobe controlled by manually'operated means. I have also provided aconvenient method of introducing fresh air whichis heated as it passesinto the pipe section and is thence led to the point of combustion, verymuch aiding and increasing the eiiiciency of the combustion.

- It is obvious that minor changes in the details of construction andthe arrangement of e Y, parts may be made Without departing from thespirit of the rinvention as set forth in the appended claims.l

.Y Having thus fully described my invention,

what I claim as new and desire to secure by Y Letters Patentis l. A.rua-in pipe section having means at its end and at its side forinterchangeable connection with the smoke collar of a furnace, means forheating and admitting air to the pipe section whereby it may passthrough the smoke collar to the combustion chamber, a hand damperassociated with said pipe section and an automatic draft breakerconnected with said pipe section.

2. The combination of a main pipe section having meansforinterchangeable connection with the smoke collar of a furnace wherebysaid ipe may be used as a horizontal section or e1 ow section, flangesat the ends of said main pipe section, said flanges having openings forreceiving sections which are smaller in cross sectional area than themain pipe section, dampers associated with said section and means foradmitting air to the pipe section at a point adjacent the attachment tothe smoke collar.

3. The combination of a main pipe section having means forinterchangeable connection with the smoke collar of a furnace wherebysaid pipe may be used as a horizontal section or elbow section, flangesat the ends of said main pipe section, said anges having openings forreceiving pipe sections which are smaller in cross sectional area thanthe main pipe section, dampers associated with said section, said mainpipe section having outwardly projecting flanges, a casing or acketconnected thereto and forming an annular chamber, said flanges havingports formed therein whereby a1r may be admitted to said annular chamberat a point remote from the attachment to the smoke collar, pass alongsaid chamber and enter the main pipe at a point adjacent the smokecollar.

In testimony whereof, I aiix my signature in the presencecof twowitnesses.

DAVID FLOURNOY MORTON.

Witnesses:

ALFRED H. TAYLOR, Jr., CLAImNcE N. COLLINS.

